/*
 * Eugen Stoian <stoian.e@gmail.com> 2010
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#include "UserFunTable.h"

UserFunTable::UserFunTable()
{
}

UserFunTable& UserFunTable::instance(){
    static UserFunTable* _instance = new UserFunTable();
    return *_instance;
}

bool UserFunTable::add(const QString& signature, const QStringList& varList, ExpressionTreeNode* tree){
    UserFunTable::FunInfo info(varList,tree);
    if(instance().find(signature))
        return false;
    instance()._funHash[signature] = info;
    return true;
}

void UserFunTable::remove(const QString& signature){
    instance()._funHash.remove(signature);
}

ExpressionTreeNode* UserFunTable::find(const QString& signature){
    UserFunTable::FunInfo info = UserFunTable::instance()._funHash.value(signature);
    if(info.isValid())
        return info.tree()->copy();
    return 0;

}

QStringList UserFunTable::varList(const QString& signature){
    UserFunTable::FunInfo info = UserFunTable::instance()._funHash.value(signature);
    if(info.isValid())
        return info.varList();
    return QStringList();
}
